I have a list lookup dropdown control on my form that is linked to a column in a separate list I've produced in SharePoint 2013. It displays the contents of that list just fine, and lets you pick any entry. I also have a yes/no control on the form. When the yes/no control is checked, I want the list lookup dropdown entry to change from whatever was previous selected to the entry 'n/a' (which is ID1).
Ticking the yes/no control does not achieve anything. Nothing changes in the dropdown. Can anyone please tell me where I'm going wrong?
Many thanks, in advance.